Concentrator.



W. A. BU'I'GHART.

CONGENTRATOR.

APPLICATION num MAY 31, 1911,

1,000,579. Patented Aug.15,1911.

y UNITED STATES PATENT OFFICE.

WILLIAM A. BUTCHART, 0F LOS ANGELES, CALIFORNIA.

CONCENTRATOR.

Specication ot Letters Patent. Pteted Aug. 15 191L Application n led May 31, 1811.

Serial No. 630,469.

To all whom it may concern:

Be it known that I, WILLIAM A. Buron- Aar, a citizen of the United States, residing' at Los Angeles, in the county of Los Angel'es and State of California, have invented a. new and useful Concentrator, of which the following is a specification.

This invention rela-testo improvements on the concentrator table disclosed in my application, Serial No. 608,455, tiled in the United States Patent Office Februarydth, 1911, and the main object of the present invention is to improve the method of placing the riles upon the surface of a concentrator table as set forth in said application, with a View to reducing to a minimum the loss of values, facilitating the separation of the values from sands or gangue and sharply differentiating between the discharge of tail ings and of values.

'The utility of the following described system of riling depends upo n the fact that the mineral contents of pulver-ized ore ma)I7 be impelled and conducted along an upwardly inclined channel not parallel to the line of reciprocal motion of the table and against a suitable flow of water moving in a contrary direction, while the pulverized rock or sand is .unable to follow the saine course and may thus be separated from the mineral. The total rise in such upwardly inclined and deflected channels must be properly proportioned to the specific gravity of the mineral contents of the ore, and as an ore may carry its values in several chemical combinations of different specific gravities, it becomes desirable to so vary the total rise in said deflected channels that all valuesinay be taken into concentrates.

Other objects of the invention 4will appear hereinafter.

Theaccompanying drawings illustrate the invention, and referring thereto: Figure 1 is a plan of the table. Fig. 2 is st plan of one of the. rillles. Fig. 3 is a contour diagram of one of the riiiles.' Fig. et is a side elevation of' one of the riitles. Fi 5 is an elevation of the rear end of the ri le shown in Fig. 4C. Fig. 6 is an elevation of the front end thereof.

i designates the concentrator table or deck. Said table is provided with riles 2, extending longitudinally thereon with a. feed box 55 at the rear end and at the side Whlch, in tlf-:1e o eration of the machine, is the higher si e of the table, and with a water box 4 on the same side as the feed box and extending the remainder of the length of the table, for supplying wash Water to the' higher side thereof. Suitable means are provided for supporting the table at an inclination both transverse and' longitudinal, and for permitting of longitudinal reciproeating motion imparted to the table by any suitable head motion, for. example, means indicated at 5 in Fig. l.

Each 'of the riles of my system `comprises a tapering rear portion 7, extending from the rear or feed end of the table to a point intermediate of its length, uniformly di minishing in height from rea-r to front, and terminating upon a diagonal line extending from a point at the rear of the table near the feed box toward the lower front discharge corner of the table, and a ril'fie portion indicated at 9 and 10 extending fromv the termination of said tapered portion to the discharge end of the table, this portion 9 and 10 of the rilfie being of practically uniform height throughout its length. These ritlles maybe made of any suitable material. The two portions described may be made separately and joined upon the table surface. or the whole ritlie 'may be made in one continuous strip combining the features of the two portions, or may be constructed by cutting or otherwise removing from a suitable surface such portion thereof as will leave the said riiiles projecting therefrom in the shape and form described. These riles vare of rectangular cross-section throughout their length. The riies are bent at certain points in such la manner as to divide the table into three distinct areas or zones as follows 1. The tapering Arear portions '7 Iof the ritiies are laid parallel -to the line of motion or longitudinal axis of the table, receive the supply of pulverized ore and its accompanying water, and constitute, withI their intervening channels, the stratifying zone.

2. From the diagonal l'ine upon which said taperin portions terminate, the succeeding ,portlon 9 of the riftle is not rallel to the line of motion of the table, ut ex-V tends at an anglethereto andtowaird the higher or feed and wash-Water side ofthe table, for a distance'l and at an angle .determined by the class of ore which the table may be designed to handle. fiected portions are from one and one-half to three' and one-halfV feetin length near Avtliefeed 330x, becoming.' progressively shorter .an ha .lowrfront .o f the table. This portion of the riiile system constitutes the separating and cleaning zone, 'and its function is to receive and conduct the already stratified mineral, while the backward fiow of water caused b v the upward deflection of the rifHes, washes awa and removes the pulverized rockor san Ihe decreasing rlength of the deiiected, riiiie portions preferably such as to give to this zone a trian lar shape, the base being at 'the rear of t e table near the feed box and cleaningzone, `the succeeding or terminal portion 10 of each rfiie is deflected toward to the table through the apex approaching the lower front dis- -charge corner of thetable.

3. From the diagonal line forming -the forward boundary of the separating and the lower side-of the table along a course which will equalize the longitudinal elevation and the transverse depression `'of the table, so that the channels' between the riffies are approximately level. This arrangement allows a free transverse -flow of water to the separating and cleaning zone, prevents more than the desired amount of water going over the concentrates discharge end of the table, the retention of ample water in the terminal riie portions being requisite to the proper movement and discharge of the concentrates These terminal portions of the ritlies A forni the discharge zone.

In operation, the

'the feed box, from any ysuit-able source discharging intosaid box,

-is received upon theftapering .rear portions.

7 of the riiiles. in the stratifying zone, where it is's'pread in a broad band or. sheet, the

diiferei'ltial motion'of the table ,causing the;

mineral content to settle to .the bottoms of -the inter-rile channels and to advance.

thereon 'toward the separating and cleaningzone, while the liszhtersand is .washed over the successive riiies toward the lower edge of the table'and eventually discharged as waste.

defiect-ed portions 9 of the riflies inthe separating and cleaning zone, its greater spe! ciiic gravity and cohesion allow it to be carried forward along' the upwardly depulverized ore supplied .When the mineral reaches the being, facilitated by the spreading of the concentrates over the wider spaces separat-- ing the riiiies of the separating and cleaning zone. The heavier portions of the. coninterQri e channels, while the lighter poi- -tions ofthe concentrates, stratified and carried. forward by the tapering riilie portions lower on thetable, arebrought to the sep. arating and cleaning zone at points Where the decreased .total rise in the .inter-rifiie channels is proportionate -to` the.' lower speciic gravity of such concentrates, and thereupon passte' the discharge zone by reason of having reached points. inv the cleaning zone at which their speciicgravity is suiiicient to cause them tobe carried over the rise in such interriii ie `c'hannel s. `In passing from the cleaning zone tc the discharge zon-e, the concentrates are gathered .into compact. massl completely filling 'the narrower inter-rime channelsofthe latter, over which the wash Waterflows unobstructedly to those portions of the cleaning vzone lower on the table. y The concentrates are carried to the end of the table and discharged into a suitable receptacle, the 4sand does not pass the separatijng andacleaning. zone and is discharged alongthefront or lowerl side of the table. 1

WhatIclaimis:

1. VA reciprocating concentrator table. having-a pla-ne surface, means for feeding material .at theupper rear portion of they table and' means for supplying wash 'Water along the upper side. of thetable. riiiles upon said table, comprising tapering rear portions parallel qto the line of'motion of the table, terminating upon a diagonal line, adjacent riiiie portions detiected 'obliquely toward 'the higher .side of vthe table and at an angle to the'longitudinal axis thereof, said defiected porti ons progressively decreas ing in length from the higher or rear side of.. the-. table toward the llower or tailings Adischarge sidefth'ereof. said dei'ected'pon tions commencing upon the .diagonal line formed .by the en ds of the tapering portionsand. ending along a line also diagonal tu the longitudinal Vaxis of -th'e table, the

initial and inallends of said deflected portion of each riiile being nearer to the concentrates discharge end of the table than the corresponding ends of the defiecting riiiie portion next higher on the table.

2. A reciprocating concentrator table having-a plane surface. means .for feeding material at the upper rear-portion of the tableand means 4for s upplyinrrwash water alongv the upper'side'- of the""t`able. .rifiies upon 'said table. comprising tapreifineg rear?" portions parallel to-'the line .of motion of the table, terminating upon a diagonal line, adjacent riflle' ortions deflected obliquely toward the hig er side of the table and at an angle to the longitudinal axis thereof, A said deflected portions progressively decreasing in length from the'higler' or rear side of the table -toward the lower or tailings discharge side thereof, in such manner as to `forma separating and cleaning zone of substanfiall .,triallgulari shape with the base at the bac( .o't' the` table and-the apex near the lower front discharge corner thereof, said deflected portions commencing upon the diagonal line formed by the ends of the tapering portions and ending along a line also diagonal tothe longitudinal axis of the table, the initial and final en dsof said deflected portion of each riflle being nearer to the concentrates discharge end of the 20. table than the corresponding ends of the deflected riflle portion next higher on the table.

3. A reciprocating concentrator table having a planesurface, means lfor feeding material at the upper rear portion of the table and means for supplying wash water along the upper side of the table, rif'fles upon said Itable, comprising taperin rear portions parallel to the line of mot1on of the table,

terminating upon a diagonal line, adjacent riflie portions deflected obliquely toward the higher side of the table and at an an le. to the longitudinal axis thereof, said de ected portions progressively decreasing ,in length and in total rise, from 4the higher or rear side of the table toward the lower or tail- 'ings discharge side thereof,in such manner as to form a separating and cleaning zone of substantially triangular shape with the base 40 at the back of the table and the apex near-the lower front discharge corner thereof, said deflected portions commencin upon thediagonal line, formed by the en s of the tapering portions and ending along a line also 4 5 diagonal to the longitudinal axis of the table, the initial and final ends of said4 deflected portion of each riflle bei the concentrates "discharge-end o the table than the corresponding ends ofzthedeflected 50 riflle portion next higher on the table.

4. reciprocating concentrator table hav- 4 ing a plane surface, means .for feeding majterial at the upper rear portion ofthe table means for' supplying wash'water along the upper side of the table, ,riles uponr said table, comprising ta erin rear portions parallel tothe line o y motion of the table, terminating upon a diagonal line, adjacent riflle'portions deflected obliquely toward the 90 higherside of the table and at an angle to thc longitudinal axis thereof, said angle. of deflection of said riffle ortions increasing inversely as their length, said deflected portions progressively 4decreasing in length and total rise, from the higher or rear side of the nearer to.

.lower slde o nels between the tabletoward the lower or tailings discharge -side thereof, in such manner as to form a separating and cleaning zone of substan tially triangular shape with the base at the back of the table and the apex near the lower 4front discharge corner-thereof, said deflected portions commencing upon the diagonal line formed by the ends of the tapering portions and ending along aline also diagonal to4 the longitudinal axis of the table, the initial and filial ends of said deflected portion of each riffle beingnearer to the con-- centrates discharge end of the table than the correspondin ends of the deflected riflle portion next igher on the table. I

5. A reciprocating concentrator table hav- 'ing a plane surface, means for feeding mate- 'IOV said rifile port-ions increasing inverselypas.

their length, said deflected portionsprogressively decreasing in lengt and total rise frorn'the Vhigher or rear side of the' table toward the lower or tailings discharge de thereof, in such manner as to form a. se 1arating and cleaning z'oneof substantial triangular sha-pe with the base. at the baci of the table and the a ex near the lower front corner thereof, said deflected portions...

eommenein upon the diagonal lineformed by the en s .of the tapering'portions .and ending along a line also diagonal to.the longitudin'al axis of the table, the initial and 1ersA final ends of said deflected portion 'of eachriflle bein charge en of the table than the corresponding ends of the-deflected riflle' portion next higher on the table, and terminal riflles extending from the discharge ends of the deflected rillle ortions obliquely toward the i) the table u on linesV which neutralize the longitudina and transverse inclinations of the .table so that the chan- 1 l riflles are approximately eve nearer to the 'concentrates dis- 6. A reciprocating concentra-tor table hav- V ing a plane surface, means for feeding matel rial'at the upper rear portion of the table and means for sup lying v vash water alon the upper-side of tie table, riflles upon sai table, comprising rear ,portions parallel'-t0 the line of motion of the table, terminating upon a diagonal line, adjacent riffle portions deflected obliquely toward the hi 11ersido. of the table and at an angle to the ongitudinal axis thereof, said4 angle of .deflection of said rillle port-ions increasingpro-f gressively from the rear toward the front' p triangular shape with the base at the bac of the tableA and the apex near the lower front discharge corner thereof, said deflected 1. pmftions commencing upon the diagonal line formed by the ends of the tapering portions and ending along; a line also diagonal to the longitudinal axis of the table, the initial and lin-1l ends of said deflected portion of each rii'lle ieng nearer to the concentrates distending from the discharge ends of the dek flected rie portions obliquely toward the 2 loWer side o f the table upon lines which neutralize lthe longitudinal and transverse inclinations of the table. In testimony whereof, I have hereunto set my hand at Los Angeles, 26th day of May 1911.

WILLIAM A. BUTCHART. In presence ofe- ARTHUR P, KNIGHT, GLADYS RUSSELL.

Copesof this patent'meybe obtained for ve cents each, by adiressing the Commissioner of Patents,

. A. Washington', D. C.

California, this 25 

